Fireproof floor construction.



Patented @11.14, 1919.

3 SHEETS-SHEEI' 2V.

A'. 1 WIDMER. FIREPROOFFLOR CONSTRUCTION. @PPLICATION FILED SEPT. 2s.1911.

Patented Jan.14,191'9.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

AnTIIUa J. wInmEn., or wEesTEn Gnovns, IIIssoUnI, AssICNoaTo wIDmEaENGINEnnNe COMPANY, or sT.. ,I.oUIs, MISSOURI, n coeroaATIoN or nus-`soUnI.

IInnrnoor FLooa CONSTRUCTION.

Patented Jan. 14, 1919.

Application led September 28, 1917.` Serial 110.193,641.

To all 'whom` t may concern Beit known that I, ARTHUR J Wro'M'nR,lacitizen of the United States, and a resident of Webster Groves, in thecounty of St. Louis and State of Missouri, .have invented j a new andusefulImprovement. in Fireprpofk Floor Constructions, of which thefollowing is a specification.

This invention relates to' fire-proof floor constructions and hasfor itsobjects to elimi inate unnecessary dead'weight and to provide .moreeconomically than has. hitherto been -practised for thecompressivevstresses, in concrete floors |adjacent to their supports.

-Existing types of iioor construction provide additional lconcrete forthefcompressive stress at the middle of the iioor spans, but more recentpractice in the design of remforced .concrete floors continuous overintermediate supports requires provision 1n the bottom ofthe iioor atthese supports for the compressive stresses due to the negative jmoment.

The object of my .invention is to provide additional concrete forcompressive stresses in the bottom of the floor at the supports and inthe upper region of the floor near the i middle of the spans. Myinvention consists principally in making the concrete' of T- shape inthemiddle of the. spans and of 1nverted T-sh'ape adjacent to the supports.The'spaces between the concrete members may be filled with tiles ofinverted T-shape in the middle of the spans and with tiles of .T-sh-apeadjacent to the supports.

Further details of the invention appear in the following descriptionthereof,- reference being had to the accompanying drawings, which showthe invention in'several'forms.

In the drawings, whereinthesame refer.

` ance characters .designate thesame or simi` lar parts in the severalViews,

Figure 1 is a to plan viewof a concrete and tile lioor emb ying myinvention, a p0rtion of the concrete being broken away;

Fig. 2 is averticalsection through the.

licor and girder on the line 2 2 in F1g. 1;

Fig. 3 is a vertical `section through the floor on the line 3 3 of Fig.inthe left half being taken through the middle` portion of the floor theright half being taken adjacent to a gir-der; j

Fig. 4 is a section similar to Fig.. 3, showing a modified form oftile;

Fig. 5 is a fragmentary planview of a i floor having Hoor tiles for ashort distance on eachA side of the girders;

Fig. 6 is a verticalsection at the middle of thef'iioor takenparallelyto the girders on a modified" form of ribbed concrete Hoor;

F1g. 10 1s a vertical section through the.

mlddle portlonof` the floor on the line 1010 Fig. 11 isa' verticalsection taken across the ribs, adjacent `to a girder, on the line l11-11in Fig. 9;

Fig. 12 is `a vertical section through the ioor and one of the girderslon the line 124-;12 in Fig. 9;

F1g.v13 is a' sectionsimlar` to Fig. 11,.4 showing a modifiedv form ofcovering forthe spaces between the ribsadjacentto the glrders; y

'Fig' 14 is a perspective view of one of the tiles illustrated in Figs.-1 to 4; and i F lgs.. 15 and 16 are perspective views of two forms ofspacing members..

In the drawings, my invention is shown as applled to a floor which iscontinuous over intermediate supports or girders 1`. 'The girders aresupported by' columns 2. In the construction shown in Figs. 1 to 3, thefloor comprises parallel concrete members A alternating with tilemembers B. The por-- tions 3 of the concrete members in the I The spacesbetween: the concrete members are filled with tiles.

flfhe'se tiles have ribs 6 on onesurfac'e...` .The `100` ,V ribs 6`space the horizontal portions ofthe concrete membersapart. When thefloor is laid, the tiles adjacent to the supportare placed with the rib6 underneath. .The arm` -4 vof .the is thus formed 'beneath thetiles.*.105 `Remforcmg rods 7 are arranged in theconfy" crete in theregions of tensile stress.

Flg. 4 shows a modified form of construc tion embodying myinvention. Inthis modificatlon, tiles or fillers of rectangular cross-4 110 Fig. 9 isafragmentary topplan view of 'itsA across the floor. T

section are used instead of the ribbed tiles.

tom o l the form by spacers 8.' Figs. 15 and 16 show two forms of thesespacers. The

"concrete flows under the spacers 8,' embed' din them in the ceiling and`makin .a flat sur ace.. In the middle of the spans t e tiles 5 are Hushwith the bottom of the floor, the arms of the concrete members beingjoined.

'In the construction shown in Figs. 5 to 8,-

there are no tiles in the' middle of the s an. Adjacent to the supports,lthere are oor tiles 9, flush with the'top of the floor. Thisarrangement. provides a Hat fioor surface.

The construction shown in Figs. 9 to 13 has no tiles.- Nailin'g strips10 are arranged e spaces between them (except adjacent to the girders)are filled with cinders 11 or other packing material. Flooring 12 isnailed to the strips 10. In Fig. 13, the channels 13 between theconcrete' ribsadjacent to the girders are shown as covered byplates 14,which are notched at the sides so as to be held `securely in thechannels.

Obviously, different forms of tiles or fillers may be used and othervariations may be made without departing from the invention.

What I claim is:

1. A Hoor construction comprising supports, and parallel members ofreinforced concrete continuous over the intermediate supports, saidmembers being of T -shape in the middle regions of the spans and ofinspaces between vsaid concrete members, saidthe concrete memberscomprising T-shaped portions in the middle region of the spans andortions of inverted T-shape adjacent to the intermediate supports, allof said tiles being alike and of the same cross-'section 'as the spacesbetween the concrete members.

3. A o'or construction comprising supports, a concrete slab continuousover the intermediate supports, the middle* ortionof .saidslabcomprising a horizonta -top por- Lacasse tion' with downwardl extendingribs, and the portions of said s ab adjacent tothe in-I termediatesupports comprisin a horizontal b cttom, portion 4with upwar y extendingr1 s.

. g4. A door construction comprisin sup.- l

ports, parallel members of reinforce concrete continuous over theintermediate sup'- po'rts, .the middle portions o f said `memberscomprism an extensive u per portion with d ownwar y extending r1 s, andthe portions of said members adjacent to the intermediate supportscomprising an extensive lower portion with upwardly extending ribs.

5. A iioor construction comprising supports and parallel members ofreinforced concrete continuous over the intermediate "supports, theportions of said members in the middle region. of the span having theirports, reinforced concrete members continuous over the intermediatesupports, tiles filling the spacesV between said concrete memf bers, theconcrete members being of T-shape in the middle region of the spans andof inverted T-shape adjacent to 'the intermediate supports, all of saidtiles being alike and comprising an oblong Abody portion havin a mediallongitudinal rib, the outer face o said rib and the face of the oppositeside of the tile being iush with the top and bottom of the concrete.

-7. A floor construction comprising supports, parallel members ofreinforced concrete continuous .over` the intermediate supports, themiddle portions of said members comprising an extensive upper portionwith downwardly extending ribs, and the portions of said membersadjacent tothe intermediate supports comprising 'an extensive lowerportion with iipwardly extending ribs and hollow tiles fiush with the`up er and lower surfaces of said members an filling the spaces betweenthem. y

Signed at St. Louis, Misouri, this 19th day vof September, 1917.

ARTHUR .1. WIDMER.

